The United States Patent and Trademark Office granted patent No. 7,081,187 for a revolutionary new impressed current cathodic protection system. The invention, designed by MATCOR President and Founder William Schutt, adds to the company’s SPL-Anode product line. The system prevents corrosion in the interior of larger diameter salt and wastewater metallic pipelines, which, because of the chlorides found in these fluids, create a highly corrosive environment. This is the first internal cathodic prevention system to use a custom version of the SPL-Anode, an anode system engineered to inhibit the development of corrosion.
“The internal cathodic protection system expands our capabilities, and exemplifies the MATCOR ability to take on a client’s challenge and run with it,” says Schutt. “We serviced a need for a client, and developed the technology to solve pipeline corrosion problems that were not addressed previously. This patent demonstrates what we mean when we say we can take on any challenge anywhere on the globe.”
The MATCOR cathodic protection system is a double-ended, flexible anode assembly that is placed inside a pipeline. Each end of the anode assembly has a pressure-seal fitting where the DC electrical power supply is connected. Once the system is installed and energized, it produces a safe, low voltage DC electrical current that stops corrosion. Special monitoring devices ensure corrosion is not occurring.
Schutt designed the system as a linear anode for the internal surfaces of pipelines. Kruger Aquacare of Denmark commissioned MATCOR to develop a solution that could be easily installed, and limit the shutdown time, both critical factors in pipeline projects. The result was the patented internal cathodic prevention system. While other systems use sacrificial or permanent anodes that are heavy, costly, have a limited lifespan, and do not produce enough power to generate a required DC voltage, the MATCOR impressed current system compensates for these deficiencies by providing a transformer rectifier that drives higher voltages. Kruger Aquacare is a division in Kruger that specializes in water-treatment and corrosion. Kruger is owned by Veolia Water, the world leader in water and wastewater services.
Using the internal cathodic protection system, anode assemblies can be as long as 200 feet between entrance fittings, as opposed to other systems that require several probes along the pipeline. With the patent in hand, MATCOR will pursue several other pipeline and mining projects in the United States and worldwide.